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[" 32.If "vec a,vec b" and "vec c" are t...

[" 32.If "vec a,vec b" and "vec c" are three unit vectors equally inclined to "],[" each other at an angle "alpha" .Then the angle between "vec a" and "],[" plane of "vec b" and "vec c" is "],[[" (a) "theta=cos^(-1)((cos alpha)/(cos(alpha)/(2)))," (b) "theta=sin^(-1)((cos alpha)/(cos(alpha)/(2)))],[" (c) "theta=sin^(-1)((cos alpha)/(cos(alpha)/(2)))," (d) "theta=cos^(-1)((sin(alpha)/(2))/(sin alpha))]]

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